What is CVE-2026-123335?

CVE-2026-123335 is a low-severity vulnerability in Jetbrains Youtrack, classified under Missing Authorization. CVSS score: 3.5/10. Published 2026-11-06.

How severe is CVE-2026-123335?

Low severity. CVSS v3 base score is 3.5 out of 10.

Auth bypass in Jetbrains Youtrack

CVE-2026-123335

In JetBrains YouTrack before 2026.2.19562, 2026.1.14137, 2025.3.169041 missing authorization allowed attaching tags to any issue via the tag issues collection

Vulnerability class: Broken Access Control

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (7.1th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Jetbrains Youtrack

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

www.jetbrains.com/privacy-security/issues-fixed/

Frequently asked questions

What is CVE-2026-123335?: CVE-2026-123335 is a low-severity vulnerability in Jetbrains Youtrack, classified under Missing Authorization. CVSS score: 3.5/10. Published 2026-11-06.
How severe is CVE-2026-123335?: Low severity. CVSS v3 base score is 3.5 out of 10.